CVE-2026-57280 Jenkins Project CVE debrief

Who should care

Defenders responsible for Jenkins instances with the Script Security Plugin installed should assess exposure and apply patches or updates to prevent potential attacks. This includes reviewing compensating controls, monitoring for potential attacks, and tracking exceptions. Defenders should prioritize verifying exposure and applying patches due to the high CVSS score of 8.8 and the potential for attackers to bypass sandbox protection. Security teams and IT-

Why it matters

The CVE-2026-57280 vulnerability in Jenkins Script Security Plugin allows attackers to bypass sandbox protection, posing a significant risk to Jenkins instances. Defenders should prioritize verifying exposure and applying patches or updates.

• Attackers may bypass sandbox protection and invoke arbitrary constructors.
• Defenders need to verify exposure and apply patches or updates to prevent potential attacks.
• The vulnerability has a high CVSS score of 8.8, indicating a significant risk.

Technical summary

The Jenkins Script Security Plugin versions 1402.v94c9ce464861 and earlier do not intercept implicit type casts applied to the elements of typed for-each loops in sandboxed Groovy scripts. This allows attackers able to provide such scripts to invoke arbitrary constructors and bypass the sandbox protection. The vulnerability has a high CVSS score of 8.8, indicating a significant risk. Defenders should prioritize verifying exposure and applying patches or updates to prevent potential attacks. The vulnerability affects Jenkins instances with the Script Security Plugin installed.

Defensive priority

Defenders should prioritize verifying exposure and applying patches due to the high CVSS score of 8.8 and the potential for attackers to bypass sandbox protection.

Recommended defensive actions

• Verify exposure by checking if the Jenkins Script Security Plugin version is 1402.v94c9ce464861 or earlier.
• Apply patches or updates to the Jenkins Script Security Plugin to fix the vulnerability.
• Monitor for potential attacks or suspicious activity on the Jenkins instance.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability, including its description, CVSS score, and affected versions. The vulnerability affects Jenkins Script Security Plugin versions 1402.v94c9ce464861 and earlier. Defenders should verify exposure and apply patches or updates to prevent potential attacks. The vulnerability has a high CVSS score of 8.8, indicating a significant risk. There is no evidence of public exploitation, but defenders should remain vigilant.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.